How to Check Progressive Glasses for Unwanted Prism
Progressive lenses can deliver exceptional vision—but only when the prism is right. Even tiny errors at the Prism Reference Point (PRP) can trigger headaches, nausea, or non-adapt remakes. In this article, Edward Jiongco, ABOC, NCLEC, LDO (NV) walks opticians through a clear, reliable process for spotting unwanted prism before it becomes a patient problem.